“We shut it down, baby! We shut it down!” a man shooting video of the scene can be heard saying in a clip posted to Twitter.
The 16-second video pans over three express lanes near Cheesequake, New Jersey, in the middle of the state, that are at a complete standstill as cars and trucks with Trump 2020 flags beep their horns and people mill about.
Over the last several weeks, Trump supporters have criss-crossed US highways in convoys of as many as thousands of cars to promote the Republican president, who faces Democratic nominee Joe Biden in the 2020 presidential election just two days away.
Several people on Twitter complained of being late to work due to the congestion caused by the parked cars in the express lanes. Some pointed out that conservatives for years have denounced political and civil rights demonstrators that have sought to disrupt the flow of traffic by creating picket lines on major streets and highways.
— Breaking911 (@Breaking911) November 1, 2020
New Jersey, which has been a Democratic bastion for decades, is not expected to be much of a political battleground this time around either.
While the Garden State had a Republican governor, Chris Christie, as recently as 2018, Mr Biden has consistently polled more than 20 percentage points ahead of Mr Trump there.
Democratic Senator Cory Booker is expected to cruise to re-election.
Tuesday is Election Day, although nearly 100m Americans have already voted early, roughly two-thirds of the total number of people who voted in the entire 2016 election.
The Garden State Parkway runs the length of its namesake state, from the state's southern tip near Cape May up to the town of Montvale on the New York state line.